Machine for nicking screw-blanks



(No Model.) 2 Sheets-Sheet 1.

H. A. HARVEY sie. s. CLARK. MACHINE POR NICKING SCREW BLANKS.

No. 314,936. Patented Mar. 31, 1885.

LN@ Modem 2 sheets-sheet 2 H. HARVEY 8v C. S. CLARK.

' Y MACHINE POR NIGKING SCREW BLANKS. No. 314,936.

Patented Mar. 31, 1885.

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HAYWARD A. HARVEY, OF ORANGE, NEW JERSEY, AND CHARLES S. CLARK, OF PROVIDENCE, RHODE ISLAND; SAID CLARK ASSIGNOR TO THE HARVEY SCREW AND BOLT COMPANY, OF CONNECTICUT.

MACHINE FOR NICKING SCREW-BLANKS.

SPECIFICATION forming part of Letters Patent No. 314,936, dated March 31, 1885.

Application filed March 24, 18534.` (No model.)

.To aZZ whom it 'may concern:

Beit known that we, HAYWARD A. HAR- VEY, of Orange, New Jersey, and CHARLES S. CLARK, of Providence, Rhode Island, have invented a certain Improvement inl Machines for Nicking the heads of Screw-Blanks, of which the following is a specification.

Our improvement relates to a type of screwmachines in which the blanks while being 1o operated upon occupy vertical positions in notches formed in the periphery of a horizontal rotating carrying-table partly surrounded by a stationary guard or segment which holds the blanks in the notches during their side- I5 wise motion ,in a circular path. l

Our present invention comprehends the provision of Vshaped notches in the periphery of the table for the reception of the blanks, so that the blanks will be firmly held therein 2o bythe pressure upon them of the inclosingguard during that portion of their sidewise motion in the courseof which they are having the nicks cut in their heads. The cutting of the nicks is e'ected by means of acircular saw, rotating on a horizontal axis and mounted in stationary bearings in such a position that its Vlower edge projects into the path of the heads to a sufficient distance to cut the nicks to Vthe proper depth as the 3o blanks are successively carried under the saw by the rotationof the carrying-table. The carrying-table may be made to rotate either upon a vertical or a horizontal axis. l In either casey the stationary guard or segment presses the blanks into the V-shaped grooves with sufficient force to hold them steady while they A are being subjected to the action of the saw.

It will be seen that, by reason of the V shape of the grooves in which the blanks are I 4o deposited, the shank of each blank has three lines of bearing, two of which are contributed by the opposite walls, respectively, of the V-shaped groove, while the other is contributed by the external guard. By reason of the greater friction upon the blank of its two bearings in the V-shaped groove, it is made to slide around the concave face of the stationary guard, and does not turn upon its longitudinal axis.

' The accompanying drawings of a machine k for nicking the heads of screw-blanks, embodying Vour improvements, represent a machine in which the carrying wheel rotates upon a vertical axis and in which there are two feeding devices upon opposite sides of 5 5 the carryingtable, two segments for pressing the blanks into the V-shaped grooves, and two saws for cutting the nicks in the blanks as they are carried under the saws, and two strippers to strip the blanks out of the grooves after they have been nicked. It will b'e uuderstood, of course, that, by employing a carrying-wheel of larger diameter, space will be afforded for the employment of three or more feeding devices, three or more saws, and three or more segments, as the case may be, it being only necessary to provide in each case an arc of a circle long enough to allow for feeding a blank into one of the grooves, and then carrying the blank under the saw and discharging it.

The drawings are as follows: Figure 1 is a central vertical section taken through the line a: :c on Fig. 2. Fig. 2 is a top -view,partly in section. Fig. Sis a vertical section through the line y y on Fig. 2. Fig. 4 is a transverse vertical section through one ofthe adjustable boxes in which the saw-shafts have bearings. Fig. 5 is a top view of a portion of the carrying-wheel, showing one of the spring-jaws 8o for pressing the blank tightly in its notch in the carrying-wheel while it is being carried under the saw. Fig. 6 is a top View of a portion of the carrying-wheel and the jaw, showing one of the blanks in transverse section, and illustrating the manner in which the shank of the blank is held in its seat in the carrying-wheel by the pressure upon it of the external jaw.

The drawings represent a machine in which the frame is composed of the upright members a and the horizontal members a.

Power to drive the machine is applied by means of a belt to the pulley B, aixed to the horizontal prime shaft B', to which is aixed the pinion B2, which engages the gear B3, keyed to the counter-shaft B4, provided upon its inner end with the bevel-pinion B5, which'engages a bevel-wheel, C, affixed to the vertical shaft C, to which the carrying-wheel D is attached. The carrying-wheel D is provided upon its periphery with the transverse V- shaped notches, LZ, and is partially surrounded by the stationary segments or guards D.

By means of checking mechanisms E E, of ordinary and well-known construction, blanks are successively fed into the V-shaped notches d upon opposite sides of t-he carrying-wheel, and are held therein by the pressure upon them of the concave faces of the stationary guards D D', respectively.

In the machine represented in the drawings there are two feeding devices, respectively upon opposite sides of the carrying- Wheel. Each' blank, after having been fed into one of the V-shaped notches, is carried sidewise in a curved path by the carryingwheel, and its head is thus fed against one of the rotating saws F. The saws are respectively affixed to the horizontal shafts F F,

rmounted in vertically-adjustable bearings.

The rotation of the saw in each case is effected Lby means of a driving-belt, f, applied to a pulley, f', affixed to its shaft F. Each of the shafts F is also provided with the loose pulleysf to which the belt can be shifted, if required. Vhile the blank is being carried under the saw and having the nick cut in its head, it is firmly held in its seat in the one of the notches d which it occupies by the pressure upon it of the concave face ofthe springjaw D2. This jaw is pressed radially toward the center of the carrying-wheel, as shown in Fig. 5, by the spring D3, interposed between the outer face ofthe jaw D2 and the inner face of the surrounding horizontal member a. of the frame. As the carrying-Wheel continues to revolve, the blank, after having been carried under the saw, and after having had the nick sawed in its head, is carried against the inclined edge of the stripper G, and is thereby forced out of its notch in the carryingwheel and dropped into the chute G. The shields surrounding the carrying-wheel and the upper horizontal member c of the frame are notched on opposite sides to form the two chutes G G, as shown in Fig. 2. The shaft C of the carrying-wheel has its upper bearing in the hollow boss G2, supported by the yoke C?, which is secured to the upper horizontal member a of the frame by the bolts C4 C* 0*. The machine is provided with the usual hopper, H, arranged with the usual lifters, HtHf, affixed to the rock-shaft H2, and provided with a crank, H". The rocking of the shaft H2 is effected by means of the pitman H, connected at its upper end with the crank H3 and at its lower end with the crank H5, upon the counter-shaft h, which is rotated by means of the bevel-gear 7L engaging the bevel-wheel Maffixed to the prime sliaft B of the machine. The blanks slide by their own gravity down the usual ways, I, by which they are respectively carried to opposite sides of the carryingwheel and successively fed into the notches in the periphery of the carrying-wheel by the usual checking mechanisms, E E. Thelevers for operating the checks are respectively driven in the usual way by the cams e and e', fastened to the carryingwheel shaft C.

'In order to insure the proper presentation of the heads of the blanks to the saws, each blank, after it has been fed to the carryingwheel, and before it has reached the jaw by which it is pressed into its seat, is carried under one of the stationary guides KK, and, by

the collision of the head of the blank with the under side of the guide, the blank is forced ydown until the head alone projects above the upper surface of the carrying-wheel.

Provision is made for regulating the height of the saws above the carrying-wheel by means of the adjustable boxes in whichy the sawshafts F are respectively provided with bearings. One of these boxes is shown on an enlarged scale in section on Fig. 4f. The lower member, L, of the box is provided with a horizontal axis of oscillation by means of the pivot L, secured to the upper horizontal member a of the frame. The lower member, L, of the box is raised or lowered by means of a thumb-screw, L2, which is tapped --into the frame a', and loosely inserted through a hole in the lower member, L, of the box. The thumb-screw L2 is provided with a collar, L3, which bears upon the top of the lower member, L, of the box, and a clamp, L4, inserted into the top of the memberL of the box, bears upon the upper surface of the collar L3. The usual cap, Z, forming the uppermelnber of the journal, is secured to the lower member by the bolts Z Z.

It will be understood that, if desired, only one saw need be used, or that any desired larger number of saws may be employed by suitably enlarging the diameter of the carrying-wheel, so as to provide arcs of circleslarge enough to allow for the feeding, nicking, and discharging of the blanks. i

We claim as our invention- In machines for nicking the heads of screwblanks, a carrying-wheel provided with transl verse V shaped notches in its periphery, mechanism for feeding screw-blanks into such notches, and a segment or segments partially surrounding the periphery of the carryingwheel, so arranged that their concave faces bear upon the shanks of the blanks contained in the`notches, in combination with a saw rotating upon an axis at right angles to the axis of the carrying-wheel, and having its cuttingedge intersecting the plane in which the heads of the blanks are moved by the rotation of the carrying-wheel.

H. per. HARVEY.

CHARLES S. CLARK.

Witnesses:

W. H. THURsroN, E. P. ALLEN.

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